Mining wireless short-range communication technology based on sidelink communication

Mining wireless short-range communication technology has the characteristics of low latency, high reliability, and flexible networking, and is a key means to address problems encountered in the intelligent mine construction, such as large data transmission delay, complex information interaction processes, and limited equipment control accuracy. At present, research on mining wireless short-range communication mainly focuses on ZigBee, WiFi, and 5G. ZigBee is difficult to meet the requirements of routine applications, WiFi suffers from co-channel interference and large transmission delay, and 5G involves uncontrollable data transmission risks and high costs. To address these problems, this study proposed a mining wireless short-range communication solution with sidelink communication operating in licensed dedicated frequency bands as the core. Two types of architectures were constructed, including an independent networking architecture for mining sidelink communication and a hybrid networking architecture integrating mining sidelink communication and 5G for mining, forming a new full-scenario mining communication mode of "wide-area coverage plus local enhancement". To meet the requirements of time synchronization, resource efficiency improvement, and reliability assurance in the application of sidelink communication in coal mines, key technologies such as GNSS-free time synchronization, dynamic configuration of resource pools based on subframes and subchannels, physical-layer wireless signal transmission, and distributed resource allocation for terminals were investigated, which effectively improved the adaptability and reliability of the system in complex coal mine environments. Application scenarios of mining sidelink communication technology in intelligent equipment control, underground autonomous driving, and emergency command during disasters were also studied, which verified its practical value in promoting the integration of mining operations and communication systems. A test system simulating a GNSS-free underground coal mine environment was built in the laboratory, and the test results showed that the average system latency was less than 23 ms, which effectively met the requirements of critical mining scenarios for wireless short-range communication technology and provided a reliable wireless short-range communication solution for intelligent mine construction.